Means for securing eccentric motion



June 30, 1931. w. MESSINGER MEANS FOR SECURING EGCENTRIC MOTION Filed May 14, 1950 A ZZI S d 'er- Patented 30 i I I I q WILLIAM m issmenn; F minimums,- aaa et mrai;

, MEANS Fort SECURING' QECCEiiIT RIC e I I Application filed Ma 14, 1930-. serial;11 5452361. i I

-The subject of my invention is an im opposite to;it. 'BollersfI'Z and 9 whichiare proved device for securingeccentricmotion, .spaced at distancesof. 90? from rollers 6 and t I In general, it consists of an electric motor the 8, are o f equal diameter, The rollers have, rotor'of which is attached to the cage ofa rollprojecting trunnions which are j ournaled in er bearing. Two of thegrollers ofthe bearcup .and cone style ball bearings 10. .55 ing, which are mounted diametrically oppo- As the balance wheel rotates carrying with site, are of'different diameter. The twoinit cagelo the four rollerstraverse over .the termediate rollers, which are mounted at 90, I cylindrical surface of roller: bearing inner. are of adiameter int'ermediateto the di'amj racell andwithintheborefof roller bearing 10 eters of the first mentioned rollers. I outer race 12. -12 isfheld stationary in frame 60 My device is particularlyadapted to shake By reason of the uneven size of rollers .6 i or reciprocate screens butit is capable of use and 8 the inner race'all of the rollerbearing Y I wherever eccentric motion is desired. has imparted toit a gyrating movement, the further feature of my invention is that axis 13 describing a circle T whose radius is 15 two such motors and bearings may be keyed equal to-the difference between the, diameters 6.

inthe same relativepositions to the ends of a of rollers "6 and 8.-- Thelgyrating movement shaft or tube whereby the shaft or tube is is transmited to a tube 14: which extends to actuated from both ends. I the leftand at the end of-which islmounted Another feature of my invention consists another eccentric motionroller bearing simi- E I in providing for the centrifugal force of thev lar to the one just described, likewise pro 7!) i I 5 web of wheel 4 is attached by means of bolts Instead of rollers 6, 7 8 and 9,-balls'of like;

motor by making the casing of the motor of pelled by a similarly constructed motor and decreased thickness adjacent the smallest balance wheel. roller or by providing adjustable weights. a 'Whatever apparatus, screen or container For 'a further exposition of my invention may be carried upon or suspended from tube reference may be had to the annexed draw- 14, receives a gyrating or eccentric motion, 75

ings and specification at the end whereof-my The centrifugal forceofsuch apparatus must invention will be specifically pointed out'and be counterbalanced and this is accomplished claimed. by making-the rim l-off wheel t offvarying I thickness'orby applying'movablecounterbal Figure 1 is a 'cross section elevation ancinglweights. To insure unison of action through my device, I I of the eccentric motion roller bearings atthe' Figure'2 is an end view of the bearing two ends of tube lathe roller cages care w i forms p of y ce, and tied together throu h; shaft 13 which is. Figure'3 is a detailed view in cross section splined to the hubs ofth'e'two wheels 4. showingamodified'form ofcounterbalancing z The primary application of this device is.

the eccentric weight. to operate a vibrating screen or separator. In the illustration shown, 1 is the StatOI' O The present screens require an eccentric shaft an induction 11101301 car ied HPOII le and fourroller bearing j ournals; By means Which may be aside wall of a vibrating. of my eccentric motion roller. bearing it is 3 issthe TOtOl' f e induction m possibleto dispense with two bearings, The s I When the stator 1 is suitably excitedfrom an d i in motor, the roller bearing and the a r g Current pp y, the rotor 3 is necessary counterbalance wheel are all finpropelled carrying with it the surrounding corporated, with the result that: the width fly wheel or counterbalance wheel 4:. To the of the entire screen is materially condensed. 5

In the drawings, I

55 or in any otherconvenient manner, arolldiameters may be substituted, and the quanler bearing cage or frame 5. Cage 5 in turn vtity of rollers or balls maybe varied; I serves as keeper to four-rollers 6,17, 8 and 9, a In F gure 3'tliere1s shown amodifiednieans I of a journal roller bearing. Roller 6 is of of counterbalanclng the wheel 4. ThIS con I larger diameter than roller. 8 diametrically sistsin providing wheel l with an outer rim 44 and forming wedge shaped grooves (unnumbered) adjacent the inner side of the cavity formed between this rim and the wheel 4 itself. In these wedge shaped grooves fit tongues 45 which are part of weights 46 and 47. These Weights are also made with cavities 48 and 49, the latter cavity being screwthreaded to receive stud 50. By the engagement of stud 50 against the bottom of cavity 48, weights 46 and 47 are clamped on wheel 4. By loosening stud 50, weights 46 and 47 may be adjusted around Wheel 4 to the desired counterbalancing position and the stud 50 then tightened thus clamping the Weights in that position.

I do not intend to be limited in the practice of my invention save as the scope of the prior art and of the attached claim may require.

I claim:

Mechanism of the type recited comprising in combination eccentrically arranged inner and outer circular races of which the outer one is fixed and of which the inner one gyrates around the axis of the fixed race,a cage rotatable about the axis of the fixed race as a center, rollin elements of diiferent diameters arranged between the races and mounted in the cage for revolution about their own axes, the axes of the rolling elements being spaced different radial distances from the axis of the cage, and means for driving the cage.

WILLIAM MESSINGER. 

